Question

Which of the reactions are spontaneous (favorable)?

Answer 1

Answer: Reactions: A, B and F

Explanation: Gibbs Free Energy, symbol G, combines Enthalpy (sum of internal energy) and Entropy (measure of how much the energy of atoms and molecules become spread out in a process).

The change in free energy (ΔG) is the sum of enthalpy and the product of temperature and entropy of the system.

With free energy, it is possible to determine if a reaction is spontaneous, i.e., happens wthout external energy, or non-spontaneous.

If ΔG is negative, reaction is spontaneous. If ΔG is positive, reaction is non-spontaneous.

Analysing each ΔG of the reactions above, reactions A, B and F's Gibbs Free energy are negative, so these 3 are spontaneous.